Imaging lens
First Claim
Patent Images
1. An imaging lens comprising:
- a first lens group; and
a second lens group, arranged in this order from an object side to an image plane side,wherein said first lens group includes a first lens having positive refractive power, a second lens having positive refractive power, and a third lens,said second lens group includes a fourth lens, a fifth lens having negative refractive power, and a sixth lens,said fourth lens has a concave surface facing the object side near an optical axis thereof, andsaid sixth lens has a concave surface facing the object side near an optical axis thereof.
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Abstract
An imaging lens includes a first lens group and a second lens group, arranged in this order from an object side to an image plane side. The first lens group includes a first lens having positive refractive power, a second lens having positive refractive power, and a third lens. The second lens group includes a fourth lens, a fifth lens having negative refractive power, and a sixth lens. The sixth lens has a concave surface facing the object side near an optical axis thereof.
12 Citations
18 Claims
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1. An imaging lens comprising:
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a first lens group; and a second lens group, arranged in this order from an object side to an image plane side, wherein said first lens group includes a first lens having positive refractive power, a second lens having positive refractive power, and a third lens, said second lens group includes a fourth lens, a fifth lens having negative refractive power, and a sixth lens, said fourth lens has a concave surface facing the object side near an optical axis thereof, and said sixth lens has a concave surface facing the object side near an optical axis thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An imaging lens comprising:
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a first lens group; and a second lens group, arranged in this order from an object side to an image plane side, wherein said first lens group includes a first lens having positive refractive power, a second lens, and a third lens having negative refractive power, said second lens group includes a fourth lens having positive refractive power, a fifth lens, and a sixth lens, said second lens has a convex surface facing the image plane side near an optical axis thereof, said fifth lens has a concave surface facing the image plane side near an optical axis thereof, and said sixth lens has a concave surface facing the object side near an optical axis thereof. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification